Bag making machine



May 31, 1932. A. POTDEVIN BAG MAKING MACHINE Filed Oct. 1'7, 1929 aw M1103.

BY a 0 ATTORNEYS.

Patented May 31, 1932 UNITED STATES ADOLPH PO'I'D'EVIN, F GARDEN CITY, LONG ISLAND, NEW YORK, ASSIGNOR TO PATENT OFFICE POTDEVIN MACHINE COMPANY, OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK BAG MAKING- MACHINE Original application filed October 31, 1928, Serial No. 316,195. Divided and this application filed Qctober 17, 1929. Serial No. 400,174.

This invention relates to an improvement in machines for making paper bags, and has for one of its objects the provision of a machine particularly intended for making multi-wall paper bags wherein an improved and novel form of mechanism is provided for applying adhesive to the paper web before the seaming or tubing operation.

In the accompanying drawings: v

Fig. 1 is a more or less diagrammatic view in part sectional elevation of that part of the bag-making machine embodying my invention;

Fig. 2 is a plan view of the apparatus of Fig. 1;

Fig. 3 is a section on the line 3-3 of Fig. 1; and

Fig. 4 is a View in perspective partly broken away, of the bag tube.

Inasmuch as the printing mechanism shown in my copending application Serial No. 316,195, filed October 31, 1928, of which this application is a division, constitutes no part of the present invention the same has not been illustrated herein, except that Ihave shown impression rollers 1 and 2 constituting part of the printing mechanism, the paper forming one wall of the bag and shown at 3 being led rearwardly of the machine beneath a roller 4. and from thence over the impression rollers 1 and 2. After leaving the impression rollers the web passes downwardly about a guide roller 6 and then proceeds in a direction opposed to its initial direction of travel toward the adhesive applying mechanism of Fig. 3, this web after passing through this mechanism going to the tubeforming mechanism. The paper web just referred to constitutes or provides one wall of the bag, a tube for which is shown in Fig.

4 and designated 7 The paper for the other walls of the bag is taken from supply rolls 8, 9, 10, and 11,

this paper passing directly to the adhesive 4 applying mechanism instead of going to the impression rollers 1 and 2, as explained in connection with the web from roll 3. After passing the adhesive applying mechanism all of the webs are folded simultaneously into the form illustrated in Fig. 4.

The adhesive applying or pasting mechanism of this invention is of. novel form as applied to the making of multi-wall bags. In this connection I mi ht say that it is common practice in the ma ring of paper bags to pass the paper web between a pair of rollers, one of which carries the paste or other adhesive to be applied to the web. Such an arrangement, however, is not entirely satisfactory tor the reason that should the paper web be torn at any place along its length the paste from the paste applying roller will apply paste to its opposed roller which otherwise would be dry. The result is that after the torn portion of the web is passed the roller opposed to the paste applying roller will apply paste to the wrong side of the web. In other words, paste will be applied to both sides of the web.

The present construction provides an apparatus which efliciently overcomes this objection in that I eliminate the extra roller so that should a torn portion of the web pass the paste applying roller no damage is done so far as applying paste to the wrong side of the web is concerned.

The paper web from roll 3 after passing the guiding roller 6 is passed beneath a guiding roller 12 and from thence travels upwardly in the direction of the arrow on Fig. 1 to and about a guide roller 13 spaced appreciably from roller 12, from whence it passes to the folding mechanism.

The paper from supply roll 8 and which I will designate 14 passes about a guide roller 15 and from thence upwardly about the guide roller 13 and from thence to the folding mechanism. The paper from roll 9 and designated 16 passes beneath a guide roller 17 just above the roller 15 and thence upwardly to and over guide roller 18 from whence it passes to the folding mechanism. The webs 19 and 20 from supply rolls 10 and 11, respectively, also pass beneath the guide roller 17 and thence upwardly along the underside of the other webs to and over guide roller 21, from whence these webs pass to the folding mechanism.

The guide rollers 15 and 17 are at one side of the paper webs, while the guide rollers 13, 18 and 21 are at the other side of said webs and these two sets of rollers are spaced some distance from each other. Intermediate these sets of rollers is paste-applying mechanism shown .at 22. This paste-applying mechanism comprises a gang of driven paste or adhesive applying discs 23, a disc being provided for each web and the discs are properly disposed'with relation to the web to be pasted, as to apply the paste or other adhesive to the edge or near the edge of the web. The paper webs, it will be appreciated from an inspection of Fig. 2 are staggered laterally with respect to each other.

The paste-applying discs are mounted on a shaft 24.- driven from any suitable prime mover through a belt 25 and pulley 26 or these discs may be driven by other suitable mechanism.

The discs 23 are all of the same diameter and this is of advantage as compared with existing paste or adhesive applying mechanisms used in the paper bag industry wherein a roller is employed opposed to the pasteapplying rollers and it becomes necessary, as will be understood, to employ paste-applying rollers of gradually decreasing diameters, the ratio of the diameter of the first roller of the gang to the diameter of the last roller being as the thickness of one web is to the thickness of the one web times the number of webs entering into the construction of the bag. Inasmuch as no rollers are employed opposed to my paste-applying discs 23 and inasmuch as the discs are located intermediate two sets of guiding rollers for the web, it will be obvious thatall of my paste or adhesive applying discs may be of the same diameter, there being enough give to the vseb to take care of the difference in thickness between a single web and a multiplicity of superimposed webs.

The direction of rotation of the paste-applying discs 23 is opposed to the direction of travel of the Webs being pasted.

The paste for the discs is'taken from the fountain 27.

It has been found that paste-applying mechanism such as above described is exceedingly effective and insures a thorough and absolutely satisfactory application of the adhesive or paste to the paper web and permits of a higher linear speed of the web than possible with paste-applying discs heretofore used and above referred to.

It will be appreciated also that the mechanism above described insures proper application of the adhesive to the several webs constituting the bag wall even though the webs may be torn here and there throughout their lengths and insures that no paste or adhesive will be applied to the rear face or faces of the webs.

What I claim i's 1. In a machine for making multi-wall bags, adhesive applying means comprising a gang of driven discs of a common diameter, supports above and below said discs for supporting a plurality of webs in overlapping position and to bring the webs into position to receive adhesive from said discs, and means for advancing the webs in the opposite direction of travel from that of the discs.

2. In a. machine for making multi-wall bags, adhesive applying means comprising a plurality of discs having a common diameter, a shaft to which said discs are secured, means for driving said shaft, rollers short of and beyond said plurality of discs and adapted to receive and support a plurality of paper webs in overlapping relation with that portion of the webs abreast of said discs freely supported in adhesive receiving position with respect to said discs, and means for advancing the webs in a direction opposed to the direction of rotation of the discs.

3. In a machine for making multi-wall bags, adhesive applying means, and web guiding means at each side of the adhesive applying means spaced from each other and from the adhesive applying means so as to support a plurality of overlapping webs simultaneously and to guide the portion of the webs extending across the space between the spaced web guiding means simultaneously into adhesive receiving position with respect to the adhesive applying means.

4. In a machine for making multi-wall bags, adhesive applying means, web guiding means at each side of the adhesive applying means spaced from each other and from the adhesive ap lying means so as to support a plurality of webs in overlapping relation and to guide the portions of the webs extending across the space between the guiding means simultaneously into adhesive receiving position with respect to the adhesive I applying means for the simultaneous application of adhesive to the webs, and driving means for the adhesive applying means.

5. In a machine for making multi-wall bags, adhesive applyin means comprising a gang of driven discs 0% a common diameter, web guiding and supporting rollers at each side of said discs spaced from each other and from said discs to support a plurality of webs simultaneously in overlapping relation and to guide the portions of the webs extending across the space'between the guiding rollers into adhesive receiving position with respect to said discs.

6. The method of applying adhesive to a plurality of paper webs simultaneously which method consists in supporting the webs in.

tober, 1929.

' ADQLPH POTDEVIN. 

